Chillers are an essential component of many commercial and industrial cooling systems. They are used to reduce the temperature of a space or process, often by transferring heat from one medium to another. In a chiller system, a refrigerant is used to absorb heat from the source, and then the heat is released to a secondary medium. The secondary medium can be air, water, or another liquid. Chillers are available in a variety of sizes and configurations, and can be used for both air conditioning and process cooling. The most common type of chiller is the air-cooled chiller, which uses air as the secondary medium. Water-cooled chillers are also available, which use water as the secondary medium. In either case, the refrigerant is circulated through the chiller to absorb and release heat, allowing the desired temperature to be maintained. Chillers are an efficient and cost-effective way to cool a space or process, and are used in a variety of applications, including commercial and industrial cooling, HVAC systems, and more.